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<?php |
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namespace Helix\DB\Fluent\Str; |
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use Helix\DB\Fluent\Num; |
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use Helix\DB\Fluent\Num\BaseConversionTrait; |
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use Helix\DB\Fluent\Predicate; |
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use Helix\DB\Fluent\Str; |
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use Helix\DB\Fluent\Value\ValueTrait; |
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use Helix\DB\Fluent\ValueInterface; |
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/** |
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* Character string expression manipulation. |
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*/ |
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trait StrTrait |
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{ |
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use ValueTrait; |
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use BaseConversionTrait; |
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/** |
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* @param int $direction |
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* @param null|string $chars |
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* @return Str |
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* @internal |
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*/ |
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protected function _trim(int $direction, string $chars = null) |
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{ |
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$function = [-1 => 'LTRIM', 0 => 'TRIM', 1 => 'RTRIM'][$direction]; |
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if (isset($chars)) { |
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$chars = $this->db->quote($chars); |
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if ($this->db->isSQLite()) { |
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return Str::factory($this->db, "{$function}({$this},{$chars})"); |
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} |
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$direction = [-1 => 'LEADING', 0 => 'BOTH', 1 => 'TRAILING'][$direction]; |
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return Str::factory($this->db, "TRIM({$direction} {$chars} FROM {$this})"); |
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} |
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return Str::factory($this->db, "{$function}({$this})"); |
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} |
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/** |
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* Concatenate other strings. |
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* |
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* @param string|ValueInterface ...$strings |
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* @return Str |
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*/ |
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public function concat(...$strings) |
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{ |
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array_unshift($strings, $this); |
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$strings = $this->db->quoteArray($strings); |
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if ($this->db->isSQLite()) { |
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return Str::factory($this->db, sprintf('(%s)', implode(' || ', $strings))); |
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} |
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return Str::factory($this->db, sprintf('CONCAT(%s)', implode(',', $strings))); |
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} |
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/** |
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* Hex representation. |
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* |
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* @return Str |
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*/ |
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public function hex() |
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{ |
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return Str::factory($this->db, "HEX({$this})"); |
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} |
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/** |
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* Zero-length. |
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* |
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* @return Predicate |
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*/ |
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public function isEmpty() |
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{ |
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return $this->length()->isZero(); |
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} |
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/** |
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* Number of characters (not necessarily bytes). |
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* |
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* @see StrTrait::size() |
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* |
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* @return Num |
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*/ |
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public function length() |
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{ |
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return Num::fromFormat($this->db, [ |
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'mysql' => "CHAR_LENGTH(%s)", |
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'sqlite' => "LENGTH(CAST(%s AS TEXT))" |
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], $this); |
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} |
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/** |
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* Lowercase. |
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* |
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* @return Str |
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*/ |
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public function lower() |
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{ |
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return Str::factory($this->db, "LOWER({$this})"); |
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} |
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/** |
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* See {@link StrTrait::trim()} |
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* |
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* @param null|string $chars |
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* @return Str |
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*/ |
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public function ltrim(string $chars = null) |
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{ |
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return $this->_trim(-1, $chars); |
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} |
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/** |
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* Substring's position (1-based). |
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* |
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* The position is `0` if the substring isn't found. |
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* |
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* @param string $substring |
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* @return Num |
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*/ |
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public function position(string $substring) |
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{ |
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$substring = $this->db->quote($substring); |
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if ($this->db->isSQLite()) { |
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return Num::factory($this->db, "INSTR({$this},{$substring})"); |
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} |
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return Num::factory($this->db, "LOCATE({$substring},{$this})"); |
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} |
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/** |
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* String replacement. |
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* |
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* @param string $search |
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* @param string $replace |
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* @return Str |
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*/ |
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public function replace(string $search, string $replace) |
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{ |
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$search = $this->db->quote($search); |
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$replace = $this->db->quote($replace); |
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return Str::factory($this->db, "REPLACE({$this},{$search},{$replace})"); |
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} |
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/** |
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* See {@link StrTrait::trim()} |
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* |
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* @param null|string $chars |
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* @return Str |
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*/ |
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public function rtrim(string $chars = null) |
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{ |
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return $this->_trim(1, $chars); |
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} |
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/** |
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* Number of bytes (not necessarily characters). |
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* |
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* @return Num |
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*/ |
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public function size() |
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{ |
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return Num::fromFormat($this->db, [ |
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'mysql' => "LENGTH(%s)", |
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'sqlite' => "LENGTH(CAST(%s AS BLOB))" |
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], $this); |
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} |
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/** |
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* Substring. |
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* |
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* @param int $start 1-based, can be negative to start from the right. |
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* @param null|int $length |
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* @return Str |
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*/ |
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public function substr(int $start, int $length = null) |
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{ |
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assert($start !== 0); |
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if (isset($length)) { |
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return Str::factory($this->db, "SUBSTR({$this},{$start},{$length})"); |
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} |
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return Str::factory($this->db, "SUBSTR({$this},{$start})"); |
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} |
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/** |
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* Convert from an arbitrary base to base 10. |
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* |
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* @param int $from |
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* @return Num |
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*/ |
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public function toBase10(int $from) |
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{ |
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return Num::factory($this->db, "CONV({$this},{$from},10)"); |
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} |
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/** |
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* Trims whitespace (or other things) from both ends of the string. |
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* |
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* If `$chars` is given: |
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* - MySQL treats it as a leading/trailing string |
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* - SQLite treats it as individual characters (same as PHP) |
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* |
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* @see StrTrait::ltrim() |
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* @see StrTrait::rtrim() |
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* |
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* @param null|string $chars |
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* @return Str |
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*/ |
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public function trim(string $chars = null) |
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{ |
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return $this->_trim(0, $chars); |
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} |
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/** |
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* Uppercase. |
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* |
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* @return Str |
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*/ |
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public function upper() |
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{ |
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return Str::factory($this->db, "UPPER({$this})"); |
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} |
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} |
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hfw /
db
